<!DOCTYPE html>
<!--
 Copyright 2016 Google LLC

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
-->
<!--
This is a review tool for our screenshot-based layout tests.  It is specific to
our tests and internal test infrastructure in that it lists the names of all
screenshot tests and all WebDriver platforms in our test lab.  Our layout tests
only run when the browser is connected via WebDriver, and test runs in
environments other than our lab may produce output in different folders than
those listed here.
-->
<html>
  <head>
    <script>

const platforms = [
  'chrome-Android',
  'chrome-Linux',
  'chrome-Mac',
  'chrome-Windows',
  'firefox-Linux',
  'firefox-Mac',
  'firefox-Windows',
  'safari-Mac',
  'msedge-Windows',
  'xboxone',
  'internet explorer-Windows',
];

const screenshots = [
  'basic-cue',
  'cue-with-newline',
  'two-basic-cues',
  'duplicate-cues',
  'two-nested-cues',
  'region-position',
  'cue-with-controls',
  'bitmap-cue',
  'nested-cue-bg',
  'flat-cue-bg',
  'deeply-nested-cues',
  'end-time-edge-case',
];

const prefixes = [
  'native',
  'ui',
];

    </script>
    <style>

div {
  display: inline-block;
  margin: 0;
  padding: 0;
}

li {
  font-size: 125%;
}

.container {
  border: 1px solid black;
  line-height: 0;
}

label {
  display: block;
  padding-left: 1em;
  line-height: 1em;
}

.images {
  border: 1px solid black;
  position: relative;
}

img {
  margin: 0;
  padding: 0;
  display: block;
}

img.diff, img.new {
  position: absolute;
  top: 0;
  left: 0;
}

img.diff, img.new {
  /* By default, show the original image. */
  opacity: 0;
}

img.diff:not(:hover) {
  /* When not hovered, show the diff superimposed on the original. */
  opacity: 0.2;
}

body.shift .images:hover img.new {
  /* Holding the shift key and hovering shows the new image. */
  opacity: 1;
}

body.ctrl .images:hover img.diff {
  /* Holding the ctrl key and hovering shows the diff in red. */
  opacity: 0.8;
}

    </style>
  </head>
  <body>
    <script>

const h1 = document.createElement('h1');
document.body.appendChild(h1);

const h2 = document.createElement('h2');
document.body.appendChild(h2);

// Remove the '?' at the front of the search string.
const name = location.search.substr(1);
if (!name) {
  // Present a simple menu of screenshots to review.
  h1.textContent = 'Select a screenshot to review:';

  for (const prefix of prefixes) {
    for (const screenshot of screenshots) {
      const li = document.createElement('li');
      document.body.appendChild(li);

      const a = document.createElement('a');
      a.textContent = prefix + '-' + screenshot;
      a.href = '?' + prefix + '-' + screenshot;
      li.appendChild(a);
    }
  }
} else {
  h1.textContent = 'Screenshots: ' + name;
  h2.textContent = 'Mouse over a screenshot and use "shift" to see the new ' +
      'version or "ctrl" to see changed areas in red.';

  const keyHandler = (event) => {
    if (event.shiftKey) {
      document.body.classList.add('shift');
    } else {
      document.body.classList.remove('shift');
      if (event.ctrlKey) {
        document.body.classList.add('ctrl');
      } else {
        document.body.classList.remove('ctrl');
      }
    }
  };

  const focusHandler = () => {
    // When we gain or lose focus, the keys that were pressed before are not
    // necessarily pressed now.  Clear those states.
    document.body.classList.remove('shift');
    document.body.classList.remove('ctrl');
  };

  document.body.addEventListener('keydown', keyHandler);
  document.body.addEventListener('keyup', keyHandler);
  window.addEventListener('blur', focusHandler);
  window.addEventListener('focus', focusHandler);

  for (const platform of platforms) {
    const container = document.createElement('div');
    container.classList.add('container');

    const label = document.createElement('label');
    label.textContent = platform;
    container.appendChild(label);

    const images = document.createElement('div');
    images.classList.add('images');
    container.appendChild(images);

    const img = document.createElement('img');
    img.src = platform + '/' + name + '.png';
    images.appendChild(img);

    const newImage = document.createElement('img');
    newImage.src = platform + '/' + name + '.png-new';
    newImage.classList.add('new');
    images.appendChild(newImage);

    const diffImage = document.createElement('img');
    diffImage.src = platform + '/' + name + '.png-diff';
    diffImage.classList.add('diff');
    images.appendChild(diffImage);

    document.body.appendChild(container);
  }
}

    </script>
  </body>
</html>
